I'm assuming I was lucky to get out of the 57475 error.

I accidentally used an outdated challenge exp trainer, and then it set my exp to negative. I stopped playing for the day, before I did anything drastic. What I tried now in the game, I went on it, and then it said that my rank files were corrupted, and it set me back earlier in the level I was on.

I accidentally used an outdated challenge exp trainer, and then it set my exp to negative. I stopped playing for the day, before I did anything drastic. What I tried now in the game, I went on it, and then it said that my rank files were corrupted, and it set me back earlier in the level I was on.